94 J. R. KiNAHAN on ilie Britannic Species of 



Localities, Belfast, on authority of specimens collected by William Thomp- 

 son and also in Mr. Edward Waller's collection : Dublin, abundant near 

 Ilowth, Sandycove, and Dalkey: Youghal, authority of late Dr. Ball; Valeutia 

 Island; Lahinch, abundant; Galway, according to Professor Melville. 



In ova all the year; — at least I have taken it so in every month from Ja- 

 nuary to November. Ova, when immature, coral-red ; when approaching ma- 

 turity, muddy-red. 



Habitat, under large stones in clear pools, and also in sludge in the Itiniina- 

 rian zone, where they occur in hundreds. 



The species was first distinguished by Montagu : it is difficult to establish 

 in a tank; but when opce established, requires little care. 



The species is easily distinguished, when alive, from all the other British 

 species by its colour, and the characters of the chelipeds and rostrum. It may 

 be also distinguished from all save G. Andrewsii by the ischium of the exter- 

 nal maxillipeds being shorter than the meros ; whilst from G. Andrewsii, even 

 excluding colour, the squamulation of the chela} separates it. 



Leach has given a characteristic plate and description of the species in the 

 Malacostraca Britannica, excluding Fig. II. and his description of young speci 

 mens taken in the dredge, both of which refer to Galathea Andrewsii. 



